Guns vs Aliens : Shooting game

The last surviving humans are hiding in Greenbell, a small town near Star City. The Aliens are coming to invade Greenbell and kill every last survivor. The people of Greenbell are scared and are hiding in their homes. They need your help to survive.
People of Greebell have built a couple of watchtowers for you. Load your weapons and climb up the tower to protect the Citizens of Greenbell. Take the benefit of being at height. Shoot the Aliens as they come on sight. Use explosives and automatic weapons to destroy the groups of Aliens. Target the faraway enemy with the snipers.
A beam of light is searching for any living soul all around the town. Change location when it comes near your tower.
If you are low on ammo, shoot the ammo perks on the ground. Defeat the enemy with improved tactics and powerful weapons. As soon as the enemy gets close to the house, the alarm will start to buzz and the red porch light will glow. It is a signal for you to kill the enemy quickly. Once the enemy enters the house, there is nothing you can do to save the people in the house.
DEFEAT THE ENEMY AND SAVE THE TOWN

Features:
Compelling Sniper Experience
Assault Rifles, Pistols, Snipers, Grenades and a lot of Guns
Thrilling Missions
Best shooter experience
Amazing performance and Gameplay